Hi Jenn,
It sounds like you liked this guy otherwise you wouldn't be worried about it.
I hope he just got busy and plans to make contact with you soon-don't call him again, though.
You can shrug your shoulders now and have a date lined up with someone else by the weekend. Try not to put all your eggs into one basket. Sitting around worrying about him isn't going to make you feel good about yourself.
I hope things work out for you.